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How to Fix SharePoint Webhook and Power Automate Flow Stops Triggering
Question details
The user needs to resolve an issue where a Power Automate flow triggered by a SharePoint document library webhook stops working after initially functioning correctly.
- Product
- Power Automate, SharePoint
- Device & OS
- not provided
- Scenario
- Automating document library workflows using SharePoint webhooks and Power Automate during high file-creation volumes.
- Observed behavior
- The Power Automate flow stops responding or triggering properly, likely due to API throttling, delays, or reaching account request limits.
Ensure you have administrator or owner permissions for both the SharePoint document library and the associated Power Automate flow to check run histories, analytics, and action limits.
Review Power Automate Request Limits and Throttling Analytics
Check if your flow has exceeded the action or request limits, which is a common cause for stopped triggers during high file-creation volumes.
Microsoft enforces daily API request limits based on your licensing plan. When a SharePoint webhook sends a massive influx of triggers due to high file volumes, Power Automate may throttle the flow or pause it entirely to protect backend resources.
Log into the Power Automate portal, navigate to 'My flows', and click on the specific flow that has stopped triggering.
Click on the 'Analytics' link at the top of the flow details page. Review the 'Actions' and 'Errors' tabs for the past 14 or 28 days.
Look for HTTP 429 (Too Many Requests) errors or statuses labeled 'Throttled'. If these are present, you have hit your request limits.
Edit your flow to reduce the number of actions per run, use batching or array processing, or consider upgrading your Microsoft 365/Power Automate license for higher API limits.
Verify Webhook Subscription Expiration
SharePoint webhooks have a maximum lifespan and must be renewed. If your flow stopped suddenly without hitting API limits, the webhook may have simply expired.
Use WPS Office as a Lightweight Document Management Alternative
While resolving complex SharePoint webhook and Power Automate throttling issues can be time-consuming, you can simplify your daily document management with WPS Office. It provides a lightweight, highly compatible alternative for creating, editing, and sharing documents without relying on heavy automated cloud triggers.
- 1. Download and Install: Visit the official WPS website to download and install the free WPS Office suite on your device.
- 2. Open Your Documents: Open your existing Word, Excel, or PowerPoint files directly in WPS Office with complete formatting retention.
- 3. Manage Files Efficiently: Edit and collaborate on your files using WPS Cloud or your local drive, bypassing the need for complex external webhook setups.
Frequently Asked Questions
Why does my Power Automate flow stop running after a mass file upload to SharePoint?
High file-creation volumes can trigger Microsoft's API throttling. When a flow makes too many requests in a short period (exceeding your license tier's 24-hour limit), it gets paused or delayed to protect server resources.
Do SharePoint webhooks expire automatically?
Yes, SharePoint webhooks have a maximum expiration time of 180 days. If your flow, application, or registration script does not explicitly renew the subscription before the expiration date, the webhook will silently stop triggering.
How can I view my Power Automate flow's throttling status?
Navigate to the Power Automate portal, select your specific flow, and click on 'Analytics'. Under the 'Errors' or 'Actions' tabs, you can see if you are hitting action limits or experiencing HTTP 429 (Too Many Requests) errors.
What is the best way to handle high file volumes in Power Automate?
Instead of triggering on every single file creation, consider setting up a scheduled flow that runs periodically (e.g., every hour) to query the SharePoint library for new files created since the last run. This significantly reduces API calls and avoids throttling.
